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CVE-2026-46106: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: eventfs: Hold eventfs_mutex and SRCU when remount walks events Commit 340f0c7067a9 ("eventfs: Update all the eventfs_inodes from the events descriptor") had eventfs_set_attrs() recurse through ei->children on remount. The walk only holds the rcu_read_lock() taken by tracefs_apply_options() over tracefs_inodes, which is wrong: - list_for_each_entry over ei->children races with the list_del_rcu() in eventfs_remove_rec() -- LIST_POISON1 deref, same shape as d2603279c7d6. - eventfs_inodes are freed via call_srcu(&eventfs_srcu, ...). rcu_read_lock() does not extend an SRCU grace period, so ti->private can be reclaimed under the walk. - The writes to ei->attr race with eventfs_set_attr(), which holds eventfs_mutex. Reproducer: while :; do mount -o remount,uid=$((RANDOM%1000)) /sys/kernel/tracing; done & while :; do echo "p:kp submit_bio" > /sys/kernel/tracing/kprobe_events echo > /sys/kernel/tracing/kprobe_events done Wrap the events portion of tracefs_apply_options() in eventfs_remount_lock()/_unlock() that take eventfs_mutex and srcu_read_lock(&eventfs_srcu). eventfs_set_attrs() doesn't sleep so the nested rcu_read_lock() is fine; lockdep_assert_held() pins the contract. Comment in tracefs_drop_inode() said "RCU cycle" -- it is SRCU.

    Засегнати продукти

    • Linux Linux: 7ec535ed8724d18ae4e714d2277a5b89450659d2 преди ae9cd0b46b1890040006a2fc5e905c5d6053fd02; 340f0c7067a95281ad13734f8225f49c6cf52067 преди 44e64d8a432837308f4dda3ffe819f1ec092a0ba; 340f0c7067a95281ad13734f8225f49c6cf52067 преди 52b109f1b875b912d4ab2c5fdd8c322d47119d9b; 340f0c7067a95281ad13734f8225f49c6cf52067 преди ed2ad73bcb0a7a6cc934097d4853b6d5124c317e; 340f0c7067a95281ad13734f8225f49c6cf52067 преди 07004a8c4b572171934390148ee48c4175c77eed; 99b86d85f7c73d676c50e8c35748f94dd41389da; 6.6.35 преди 6.6.140; 6.9.6 преди 6.10
    • Linux Linux: 6.10; преди 6.10; 6.6.140 до 6.6.*; 6.12.88 до 6.12.*; 6.18.30 до 6.18.*; 7.0.7 до 7.0.*; от 7.1 нататък

    История

    • 28 май 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-46106: Linux | freedomonline.bg